package com.lrm.blog.web.admin;

import com.lrm.blog.po.Blog;
import com.lrm.blog.po.User;
import com.lrm.blog.service.BlogService;
import com.lrm.blog.service.TagService;
import com.lrm.blog.service.TypeService;
import com.lrm.blog.vo.BlogQuery;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype. Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;

@Controller
@RequestMapping("/admin")
public class BlogController {

    private static final String INPUT="admin/blogs-input";
    private static final String LIST="admin/blogs";
    private static final String REDIRECT_LIST="redirect:/admin/blogs";

    @Autowired
    private BlogService blogService;
    @Autowired
    private TypeService typeService;
    @Autowired
    private TagService tagService;

    @GetMapping("/blogs")
    public String blogs(@PageableDefault(size=3,sort={"updateTime"},direction = Sort.Direction.DESC)
                                    Pageable pageable, BlogQuery blog, Model model){
       model.addAttribute("types",typeService.listType());
       model.addAttribute("page",blogService.listBlog(pageable,blog));
        return "admin/blogs";
    }


    @PostMapping("/blogs/search")
    public String searchblogs(@PageableDefault(size=3,sort={"updateTime"},direction = Sort.Direction.DESC)
                                      Pageable pageable, BlogQuery blog, Model model){
        /*model.addAttribute往前台传数据，可以传对象，可以传List，通过el表达式 ${}可以获取到
        类似于request.setAttribute("sts",sts)效果一样。*/
        model.addAttribute("page",blogService.listBlog(pageable,blog));
        return "admin/blogs :: blogList";
    }

    @GetMapping("/blogs/{id}/input")
    public String editInput(@PathVariable Long id, Model model){
        setTypeAndTag(model);
        Blog blog=blogService.getBlog(id);
        //blog.init();
        model.addAttribute("blog",blog);
        return "admin/blogs-input";
    }

    private void setTypeAndTag(Model model) {
        model.addAttribute("types", typeService.listType());
        model.addAttribute("tags", tagService.listTag());
    }

    @GetMapping("/blogs/input")
    public String input(Model model){
        model.addAttribute("blog",new Blog());
        setTypeAndTag(model);
        return "admin/blogs-input";
    }



    @PostMapping("/blogs")
    public String post(Blog blog, RedirectAttributes attributes,HttpSession session){
        blog.setUser((User) session.getAttribute("User"));//获取当前登录用户
        blog.setType(typeService.getType(blog.getType().getId())) ;
        blog.setTags(tagService.listTag(blog.getTagId()));
        Blog b;
        if(blog.getId()==null){
            b = blogService.saveBlog(blog);
        }else{
            b=blogService.updateBlog(blog.getId(),blog);
        }

        if (b==null){
            attributes.addFlashAttribute("message","操作失败");
        }
        else {
            attributes.addFlashAttribute("message","操作成功");
        }
        return REDIRECT_LIST;
    }

    @GetMapping("blogs/{id}/delete")
    private  String delete(@PathVariable Long id,RedirectAttributes attributes){
      blogService.deleteBlog(id);
      attributes.addFlashAttribute("message","删除成功");
        return "redirect:/admin/blogs";
    }
}
